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Cylinder Head Porting

Cylinder head porting, is really the wrong description of what we do. This is because porting normally refers to the removal of metal. People are under the assumption that the removal of metal, "opens up" the port and therefore increases flow, which increases power. This may be true, but only for engines that are supercharged or turbo charged. And even this isn't always true.

To make power in your normally aspirated engine, you need the air moving through the engine, to have VELOCITY. Especially in the intake tract. Volumetric efficiency = Flow x Velocity of the air. Volumetric efficiency = The amount of air that becomes captured in your cylinder for combustion. Volumetric efficiency is directly related to TORQUE. Torque is what you care about. Horsepower comes from torque. What we do to "reshape" the intake tract, involves the adding of material and then redesigning it to increase the velocity of air into the engine up to 30%..
	No one else offers this to the public. It is left for the top teams from top engine builders, but not neccesarily in motorcycles. The same cylinder head design that we used to set the land speed record on the CRF 450R with 63 HP, and make over 40 HP on the 08 YZ250 F being built for Malcolm Smith, we offer to you, on all modern four strokes.
After the intake tract, we fix the combustion chamber. The incoming air still needs to get past the intake valves and distribute in the cylinder in the right areas. If not, they spill out into the exhaust pipe during valve overlap. Then, with a properly designed combustion chamber, the fuel and air, burns more complete, ensuring the highest power. And last, but not least, is some reshaping on the exhaust. Although, the final shape may not look optimal, it is. You need to have a shape that not only evacuates the exhaust quickly, but also keeps "dirty" exhaust from returning into the combustion chamber where it can retard the power made on the next combustion cycle. If all this sounds overwhelming, don't worry about it. It's not your job. Your job is to remove your cylinder head and send it in so you can have more instant power from bottom to top than you ever thought.

Item#	Item Name	Price	Qty	Add
CHP250	Cylinder Head Porting for 250's	$499.95
CHP450	Cylinder Head Porting for 450's	$599.95
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Average Customer Review: Based on 3 Reviews. Write a review.

0 of 0 people found the following review helpful:

08 ktm 450 exc r very impressed	August 26, 2008
Reviewer: Cameron�johnson from hurdle mills ,�NC�United States

I had F2 racing port my 08 ktm 450 excr head , got it put together today and jetted it . I am very impressed with the power i gained ,worth every penny and by far the best upgrade i have done .
A+ for the fast turn over time
and 5 stars for massive power improvements on this new xc4 motor

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5 of 5 people found the following review helpful:

Better hole shot. faster lap times	June 4, 2008
Reviewer: ron aho

I raced my YZ250F yesterday for the first time since
you did my motor. Very happy with the performance.
Hole shots and lap times improved. I would like to
give you credit for a satisfied customer. Could I get
decals for my motorcycle and race trailer.

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4 of 4 people found the following review helpful:

YFZ 450 is a BEAST	June 4, 2008
Reviewer: william deaver

I just got my YFZ450 back together & im still breaking it in, but I can tell by the sound and the way it revs up this thing is going to be a BEAST! you guys did an awesome job & im very pleased with your work so thanks again.

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